During the tourism show Bolsa Turismo Lisboa (BTL) held in Portugal this week, Mabrian Technologies, a company specializing in Tourism Intelligence services for destinations and companies, has conducted an analysis of the level of involvement of hotel accommodations in Portugal regarding sustainability practices. Sustainability is one of the main topics at BTL this year, so Mabrian wanted to provide updated information on the country’s overall situation in this aspect. They analysed a total of 2,485 hotels across the country listed on the main OTAs (Booking, Expedia, and TripAdvisor), classifying those with published sustainability certification levels. The classification they established is based on 5 levels: no certification, bronze, silver, gold, and external certification